jdk8-mips64-public/hotspot: src/share/vm/compiler/abstractCompiler.cpp@2d8a650513c2

     1 //

     2 // Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.

     3 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4 //

     5 // This code is free software; you can redistribute it and/or modify it

     6 // under the terms of the GNU General Public License version 2 only, as

     7 // published by the Free Software Foundation.

     8 //

     9 // This code is distributed in the hope that it will be useful, but WITHOUT

    10 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11 // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12 // version 2 for more details (a copy is included in the LICENSE file that

    13 // accompanied this code).

    14 //

    15 // You should have received a copy of the GNU General Public License version

    16 // 2 along with this work; if not, write to the Free Software Foundation,

    17 // Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18 //

    19 // Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20 // or visit www.oracle.com if you need additional information or have any

    21 // questions.

    22 //

    25 #include "precompiled.hpp"

    26 #include "compiler/abstractCompiler.hpp"

    27 #include "compiler/compileBroker.hpp"

    28 #include "runtime/mutexLocker.hpp"

    30 bool AbstractCompiler::should_perform_init() {

    31   if (_compiler_state != initialized) {

    32     MutexLocker only_one(CompileThread_lock);

    34     if (_compiler_state == uninitialized) {

    35       _compiler_state = initializing;

    36       return true;

    37     } else {

    38       while (_compiler_state == initializing) {

    39         CompileThread_lock->wait();

    40       }

    41     }

    42   }

    43   return false;

    44 }

    46 bool AbstractCompiler::should_perform_shutdown() {

    47   // Since this method can be called by multiple threads, the lock ensures atomicity of

    48   // decrementing '_num_compiler_threads' and the following operations.

    49   MutexLocker only_one(CompileThread_lock);

    50   _num_compiler_threads--;

    51   assert (CompileBroker::is_compilation_disabled_forever(), "Must be set, otherwise thread waits forever");

    53   // Only the last thread will perform shutdown operations

    54   if (_num_compiler_threads == 0) {

    55     return true;

    56   }

    57   return false;

    58 }

    60 void AbstractCompiler::set_state(int state) {

    61   // Ensure that ste is only set by one thread at a time

    62   MutexLocker only_one(CompileThread_lock);

    63   _compiler_state =  state;

    64   CompileThread_lock->notify_all();

    65 }

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